Die holder for folding machines



G. A. ScHREmEn. DIE HOLDER FOR FOLDING MACHINES. APPLICATION F'ILED ocr. 21. 1921. Lm., Mmm m1111922.,

2 SHEETS-SHEET I.

G. A-. SCHREINER. DIE HOLDER Foa FOLDING MACHINES d Oct. 3179. 2 sHEEs-sHEET z.

APPLICATION FILED OCT. 2l. |921.

Patente y Mfg@ aj" Passati oa. i?, resa' lstaabtl spr/Sigma PATENT @FFWQ GEORGE n. soHRErNER, on TROY, New YORK, ASSIGNOR To GLUETT, rnABonY a oo., ING., or TROY, New YORK, A. CORPORATION or Nnw YORK.

DE HOLDER FOR FOLDING MACHINES.

Application filed October 21, 1921. Serial No. 509,369.

To all whom it may concern: viding the carrier blocks 'for the relatively 55 Be it known that I, GEORGE A. SCHREINER, movable elements of the die plate with oppoa citizen of the United States of America, sitely disposed abutment vmembers between and resident of Troy, in the county of Renswhich a rigid locking block may be posiselaer and State of New York, have invented tioned during the wiping operation, whereby new and useful Improvements in Die positively to retain the relatively movable 60 Holders for Folding Machines, of which the elements of the die plate in fully extended following is a specification. position. This locking block may if de- This invention concerns folding machines sired be provided with a guiding stem proof the type commonly employed for folding jecting toward the bed of the machine and collar blanks and the like and relates more normally urged in such direction by a spring 65 particularly to the die plate over which or equivalent means, the arrangement being the material is folded and to the means for such that when the die carrier is raised the supporting such die plate. spring serves to move the block from between ln the operation of folding a collar or cuff the abutment members but when the end of blank, the die plate is placed upon the mathe stem strikes the bed plate or the blank 70 terial and the entire marginal edge of the thereon during the descent of the die carrier blank is then turned up over the edge of the the block is moved into the space between die plate and subjected to pressure. To per such abutments. If however, during the mit removal of the die plate from beneath downward movement of the die carrier, the

the folded margin of the blank it is necesabutments for any reason should be abnorH 75 sary that the die plate be made to collapse, mally close together, as by reason of failure and to this end the plate is commonly conof the die elements to assume normally exstructed of a plurality of parts each of which tended position, the block is thus prevented is mounted upon an independent carrier from passing between the abutments and the block. These blocks, with their portions of descent of the die carrier toward operative 80 the die plate. are urged in opposite direcposition is arrested. tions by suitable spring means, whereby nor- In the accompanying drawings there is mally to maintain the die plate in fully ex illust-rated by way of example one embodipanded condition but permitting collapse of ment of means whereby the above object the same for removing the folded blank. may be carried into effect. ln such draw- 85 rThis arrangement is in general satisfactory ings,- but under some circumstances it is found Fig. 1 is a fragmentary front elevation of that the action of the folders in wiping the a folding machine having the present inven material inwardly over the edges of the die tion applied thereto;

plate tends partially to collapse the die plate Fig. 2 is a fragmentary transverse cross 90 thereby producing defective work. Moresection to enlarged scale through the bed over at times, by reason of wear of the parts plate die carrier on a line such as 1Mb of or accumulation of dust and lint therein, it Fig. 3; and

may happen that the die plate, after being Fig. 3 is a longitudinal vertical cross seci collapsed for removing the folded blank tion through the die carrier. fails to return to its fully extended position, The machine table 1 is carried on suitable thus again resulting in improperly folded supports 2, 3 and is'provided with a bed work. n plate 4 upon which the work is placed to be 45 The principal object of the invention is to folded. Pivotally mounted on brackets 5 seprovide for positively locking the die plate cured to the frame of the machine is an arm members in fully extending position during 6 which serves to support the die carrier the folding of the material thereover and and the die plate carried thereby. The arm also to prevent the positioning of the die 6 may be raised or lowered manually or by 50 plate in Operative relationship to the foldthe use of any desired mechanical arrangeing mechanism until such die plate has been ment such for example as that disclosed in fully extended. i the patent to Brown, No. 1,053,477, Februln accordance with this object the invenary 18, 1913.k At its upper extremity the tion may be briefly stated to consist in proarm G is bifurcated to provide spaced meml,

bers 7, 8, and secured to such members is an inverted channel bar 9. rlhis bar may be connected to the members 7, 8 by bolts 10, or in any other desired manner.

Within the channel of the bar 9 are arranged die carryingl blocks comprising theI members 11, 12,..andv 13, lll respectively. While for convenience of manufacture these blocks are made in two parts, 'it is contemplated that they might be` made as single integral members, if desired. The upper wall of the channelbar 9 is provided with aligned slots 15, y16 through which pass screws such as 17,418 engaging threaded openings in the members 11, 13 respectively. The die carrying blocks arethus'secured in positionv in the channel. of the member 9, the

' 'screws 17, 18 servingy to retainthem in posithelower wall of the housing block 21. The

tion while permitting them to move longitudinally of the channels. Aa'ljustable` stop screws 19, 20 may bel provided for limiting the outward movement of the respective blocks in the channel.

`Within the channel andfintermediate ,the movable die supporting blocks is a stationary block or housing' 21 secured to the member'9 by means of bolts 22. The block 21 is provided with substantially aligned guide 'openings for the reception of rods 23, 24

respectively. The remote ends of the respective rods are lixedly secured in the members 11, 13 of the respective die blocks. Surrounding' 'the rods 23, 24 are coil springs 25, 26'respectively, such springs being so arranged as normally to urge the movable` die carrying blocks in opposite directions. At their inner endsftheprods 23, 24 project into a chamber' 27 within the housing block 21.

A rod 28 extends vertically through the chamber 27, being guided for sliding movement in openings in the member 9 and in upper end of the rod 28 is alsov guided in an opening' in a bracket`29 secured to the meinber 9 by means of a screw 30. A collar 31 is adjustably secured tothe rod 28 at a point above the upper surface of the bar 9 and interposed between` such collar and the under surface of the bracket 29is a coil spring 32. This spring is so arranged as normally to urge the bar 28 in a downward direction.

The members. 12 and 11i 0f the die ,block are provided with openings such as 33, while the iixed block is provided `with, openingsA such as 311-, these openings `serving for the 'reception of pins such as'35, 35al and 36.

carrying the die plate sections 37, 38 and 39 respectively.v The's'everal pins may be se-A cured in position within the openings by means of set screws 4-0 or any other desired manner, 1t being noted that the several sections of the die plate are normally arranged in the same plane. lVithin the chamber 27 in the housing block 21 is arranged a stop vsho-wnin Fig. 3 wherein its 'upper surface is below the rods 23,` 24:. In this position of the parts, also, the lower' end of the rod 28 projects slightly below the lower surface of the die plate section 29, passing through a suitable opening therein. In Fig. 3 the die carrying blocks are shown as in fully .extended position, wherein the ladjacent'ends of ther-ods 23, 241- project but slightly into the chamber 27, thus providingsullicient space between them for the reception of the stop member 41. With the parts as thus` arranged, upon'lowering of the arm 6 to bringjthfe extensible ydie plate' intozposition for cooperation with the bed plate ,the lower end of the rod 28 will strike the bed plate or the work thereon priorto the yfinal positioning of the die plate. The completion. of the downward.

movement will then carry the member 411,

upwardly into the spacevbetween the adjacent ends of the rods 23, 24. During the folding operation, the parts remain in this position and as the space between the members 23, 24 is substantially filled, there is no possibility yof relative movement of the die carrying blocks such as might ermit collapse oi the die pla-te. lVlien t e folding operation has been completed and the varm (5 israised, the spring 32 immediately acts to depress the rod 28,'V carrying the stop member il from between the ends of the abutment members 23,2413, thus permitting the operator to collapse the die plate whereby to. remove the work therefrom.v

lf for anyreason either or both of the die carrying blocks should remain in its inward position after the removal of the work as for example by reason of breakof one of the springs 25V, 26,011v by the accumulation of lint or dirt in the guideways suoli asto prevent the vsprings from acting properly, the inner end of one orl both ofthe rods 2A would extend inwardly into the chamber 2,7 in such manner as to prevent upward `moven'ient of the stop member 41. Upon downward movementof the arm` 6 such as to. cause the projecting end of. tliero'd 28 to strike the bed plate` or the work, vany. relative movement between the rod and bar 9 would be prevented by engagement of block ii-1 with one or both of the rods 23, 2&1-, and thus the downward movement of Vthearm 6 rwould be limited. The attention of the operator would thereby be called to the improperly positioned die members and. the possibility of producing defective work by reason of the improper positioning of 'such members is thus avoided.

/ilhile the invention has hereinr been shown as comprising a specific arrangement oi die carrying blocks and locking means therefor, it is contemplated as within the scope of the present invention that various changes and rearrangements in parts might well be. made without departing from the spirit of the present invention..

Having thus described the invention and the mode of operation thereof, what I claim and desire to secure by Letters Patent of the United States is:

l. A 'folding machine comprising an expansible die plate, means constantly tending to expand the die plate, and means for positively maintaining said die plate in fully expanded position during the folding operation.

2. A machine of the class described having a die plate comprising an extensible element, resilient mea-ns normally operable to maintain said element in extended position, and positive means for maintaining said element in such position during the folding operation.

3. A folding machine having a die plate comprising relatively movable members, spring means normally urging said members in opposite direction, abutment elements associated with the respective members, and a member interposable between said elements whereby positively to limit approach ot said members.

4l. A blank folding machine having a die holder comprising a pair of relatively movable die blocks, a die plate member secured to each of said blocks, spring means normally tending to separate said blocks, opposed abutment elements carried by the respective blocks, and a member movable into the space between said elements whereby to limit approach ot said blocks.

5. A die holder for folding machines comprising a support provided with a guide element, a die block slidably engaging said guide element, spring means normally urging said block in a predetermined direction, a die plate member secured to the block, an abutment carried by said block, and a stop member movable into position for engagement by said abutment whereby positively to prevent movement of said block in opposition to said spring.

6. A die holder 'for blank folding machines comprising a support provided with aligned guidewa-ys, die blocks slidably guided by the respective guideways, die plate members carried by the respective die blocks, rods secured to the respective die blocks and extending toward each other, springs encircling said rods and normally urging said blocks in opposite directions, and a block slidably guided for movement into and out ot the space between adjacent ends of said rods.

T. A die holder comprising a slidable die block having la die plate member secured thereto, a rod extending 'from said block, means for guiding said rod, a spring normallyurging said block away from such y guide means, and a member interposable in the path of movement ot' the endot said rod for limiting movement of the block toward said guide means.

8. A folder die holder comprising a support, a die block slidably guided thereby, a rodI secured to said block, spring means urging said block in a predetermined direction, a bar slidably guided in a suitable opening in said support to move in a path transverse of that of said rod, and a member carried by said bar and operative to limit movement of said rod and the block in opposition to the spring.

9. A folding machine having a die holder comprising a support, a pair of oppositely slidable blocks carried by the support and provided with die plate members, springs` normally urging said blocks in opposite directions, a bar interposed between said blocks and slidably guided in said support For movement in a path transverse of that ot' the blocks, a spring normally urging-said bar in a downward direction, and a stop member carried by said bar and constructed and ar anged to limit approach of said blocks upon movement ot said rod in opposition to its spring.

10. A die holder for 'folding machines having` a support comprising a` plate provided with spaced, aligned slots, and a housing secured thereto and between said slots, blocks having projecting elements slidably engaging the respective slots, oppositely directed rods secured to the respective blocks and extending into said housing, a bar slidably guided 'in aligned openings in said plate and housing respectively, t-he lower end of the bar normally projecting below the housing, and a stop block secured to said bar within the housing and movable into and out of the space between the adjacent ends ot said rods.

ll. A. folding machine having a movable die holder provided with an expansible die pla-te resilient means 'for expanding said die plate, and means opposing movement oit said die holder into folding position if said die plate is not fully expanded.

12. A folding machine having a bed plate and a die holder movable. into operative position relative thereto, said die holder being provided with an expansible die plate comprising relatively movable members, resilient means normally urging said members in opposite directions, and meanslimiting movement of said die holder toward the bed plate provided the die plate is not fully expanded.

i3. A folding machine having a bed plate and a die holder movable toward and from the same, a collapsible die plate carried by comprising' a bar .guided for movement in openings in said holder, spring means normally urging said bar downwardly whereby to cause its lower end to project below the bottom of the holder, :in abutment element secured to saidvbar, and means engegeable with said element upon collapse of said l0 die plate whereby to prevent relative movement of said bar and holder.

Signed by me at Troy, N. Y., this 27 th -day of September 1921.

GEORGE A. SCHREINER. 

